A record setting low pressure system continues its journey through Ontario today bringing another day of wet, windy conditions to not only Wisconsin, but the entire eastern half of the United States! Rain, snow and wind across the Dakotas, into Minnesota and Wisconsin…on the south and east side, severe weather with strong storms, high winds and tornadoes.
Meteorologically speaking we call this “bombogenesis,” a storm with a central pressure dropping 24 millibars in less than 24 hours. Record low pressure was reported across many locations on Tuesday with the lowest readings coming out of north central Minnesota (I found a few reports of 28.22” of mercury), setting an all time record for the lowest atmospheric pressure ever observed across the continental United States (this does not include tropical systems).
We can compare this storm to a mature hurricane (Cat 2 or Cat 3); thankfully for us here in the Chippewa Valley, it didn’t have the moisture a mature hurricane usually brings with it!
The winds will slowly die down by Thursday afternoon and sunshine will finally return with a gradual warm-up for the weekend! In the mean time, batten down the hatches!
Meteorologist LeAnn Lombardo
Posted under Hometown Weather
This post was written by llombardo on October 27, 2010